What is the sample standard deviation of these numbers?
0.87 0.91 0.89 0.83 0.91 0.88 0.90 0.88 0.88 0.94 0.91 0.95 0.91 0.88 0.92 0.82 0.86 0.87 0.86 0.89 0.84 0.85 0.90 0.86 0.87 0.93 0.89 0.79 0.93 0.84 0.90 0.86 0.93 0.91 0.87 0.82 0.81 0.84 0.84 0.88 0.88 0.85 0.84 0.83 0.90 0.86 0.84 0.87